Gangaur is a Hindu festival celebrated in the Indian state of Rajasthan and some parts of Gujarat, West Bengal, and Madhya Pradesh.
Gangaur is colorful and one of the most main festivals of people of Rajasthan and is observed throughout the state with great fervor and loyalty by womenfolk who worship Gauri, the wife of Lord Shiva during March–April. It is the festival of spring, harvest and wedded fidelity. Gana is a synonym for Lord Shiva and Gaur which stands for Gauri or Parvati who symbolizes Saubhagya (marital bliss). The unmarried women worship her for being blessed with a good husband, while married women do so for the welfare, health and long life of their husbands and for a happy married life. People from Rajasthan, when migrated to Kolkata in West Bengal, started celebrating Gangaur. This festival is now more than 100 years old in Kolkata. source:https://en.wikipedia.org/